Is there a way to force an android device to stay awake?

Question

This app needs the device (and its display) to stay awake between onPreExecute() and onPostExecute().

Yep, these devices appear to be narcoleptic. – Dec 21 '12 at 07:34 — , Dec 21 '12 at 07:34

score 7 · Accepted Answer · edited May 23 '17 at 12:08

7

Use a "full" PowerManager.WakeLock like in this post.

eg:

    PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "My Tag");
    wl.acquire();

Add permission to manifest file

<uses-permission android:name="android.permission.WAKE_LOCK"/>

Make sure to release it when done.

edited May 23 '17 at 12:08

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answered Sep 07 '10 at 16:34

Paul Burke

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Thanks--works great! Also need to add android.permission.WAKE_LOCK to manifest. – jacknad Sep 07 '10 at 18:41

score 2 · Answer 2 · answered Sep 07 '10 at 16:28

2

It's definitely possible - here's an example of an app which does that:

http://www.appsbeyond.com/apps/screen-suite

answered Sep 07 '10 at 16:28

DVK

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score 1 · Answer 3 · answered Feb 15 '17 at 05:40

"full" PowerManager.WakeLock is now deprecated and will lose support.

For future compatibility, use the following to force the app to stay awake:

// keep awake    
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

// allow suspend
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

No special permissions are required.

You will need to do this in the hosting activity. you could try nesting the AsyncTask, or using a callback interface implemented by the host Activity (think Fragment callbacks).

Developer Reference

Is there a way to force an android device to stay awake?

3 Answers3

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